There is something that you can buy that takes it off. Several years ago our cars and our neighbors’ cars were spray painted. When we called the cops, they came out to take a report and recommended a product to buy. I can’t remember the name of it but it worked really well. I’m sure if you went to an auto parts store, they can tell you. In our case, the little criminals went out and did this during an ice storm so the next day their footprints were frozen in the ice. One victim just tracked their footprints right to their home and called the cops. Turned out to be a couple of 13 year olds and 15 year old. (BTW, this happened out of state.)